Shock absorber



FIG. 1 is a top perspective view of the shock absorber showing my ornamental design;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image;

FIG. 3 is a top plan view thereof, the bottom being a mirror image; and,

FIG. 4 is a front view thereof, the back being a mirror image. 

CLAIM We claim the ornamental design for a shock absorber, as shown. 